Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

SAN FRANCISCO DOWNTOWN (SFOC1)

Lat: 37.77056°NLon: 122.42694°WElev: 150.0ft.

NA

52°F

11°C

Humidity 73%
Wind Speed NA NA MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 21 Jan 10:43 AM PST
Extended Forecast for

San Francisco CA

  • Today

    Today: Cloudy, with a high near 58. North wind 3 to 5 mph.

    High: 58 °F

    Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 50. Light and variable wind.

    Low: 50 °F

    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog before 9am.  Otherwise, partly sunny, with a high near 58. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 58 °F

    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after midnight.  Otherwise, mostly cloudy, with a low around 50. West southwest wind 5 to 7 mph.

    Low: 50 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 11am.  Otherwise, mostly sunny, with a high near 58. Light and variable wind becoming north around 5 mph in the afternoon.

    High: 58 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

Detailed Forecast

Today
Cloudy, with a high near 58. North wind 3 to 5 mph.
Tonight
Mostly cloudy, with a low around 50. Light and variable wind.
Thursday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 58. Calm wind becoming west southwest around 6 mph in the afternoon.
Thursday Night
Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 50. West southwest wind 5 to 7 mph.
Friday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 58. Light and variable wind becoming north around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Sunny, with a high near 59.
Saturday Night
Partly cloudy, with a low around 46.
Sunday
Partly sunny, with a high near 58.
Sunday Night
Mostly cloudy, with a low around 47.
Monday
Partly sunny, with a high near 59.
Monday Night
Partly cloudy, with a low around 47.
Tuesday
Partly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
San Francisco CA
 37.79°N 122.42°W (Elev. 197 ft)
2:13 am PST Jan 21, 2026
11am PST Jan 21, 2026-6pm PST Jan 27, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database